PIC: LeAnn Rimes Befriends Eddie Cibrian's Ex Brandi Glanville!

Nearly four years after Rimes had an affair with Glanville's then-husband Eddie Cibrian, the two women shared a friendly exchange -- and a blanket! -- to cheer on Jake, Glanville's 4-year-old son with her ex, at his soccer game in L.A. Sunday.

Rimes, 29, and Glanville, 39, called a Twitter truce in March 2011, though they often continued to ignore each other in public (most recently on December 10, when the women avoided contact during 8-year-old Mason's soccer game in L.A.).